Die-casting apparatus



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C. M. GREY DIE CASTING APPARATUS v Filed April v '1919 -ll Sheets-Shet1l dlnvllhli ciency. More specifically, among the ob! jects of theinvention, though not the ex- --fcle necessary to produce a ,givencasting, :ft

aims o Patented l .lune 12, 1923.

UITEU'STATES PATENT orrlca.

r'examens m. GREY, or EAST ORANGE, NEW .mesme l Application leii April7, 1919. Serial No. 288,082.

To all whom t may concern Be it known that I, CHARLES GREY, a

'citizen of the United States, residing at East Ora-nge, county ofEssexyand State of New vJersey, have invented a certain new and usefu.Die-Casting Apparatus, of

which the following is a specification.

This invention is a die casting apparatus, and, s aking generally, thefunctional the invention are to simplify the mechanism employed, renderthe same more automatic, and, otherwise increase its efliclusive ones,may be mentioned the following.

main working parts of the machine in such manner as to enable the same.to bev manipulated with less operators than are ordi- .narly required;to minimize the number of 'operations required in completing the erebymaterially increasing the output or lproduction of the machine; vto so Aposition arts of themaf` and arrange the several u chine as tomaterially diminish the liability of accident to an operator; toseco-ordinate the operation of the different mechanisms as to' rendersuch operations simultaneousv and capable of manipulation through acommon vpower mechanism; to provide the machine with anew type ofspruemechanism soarranged as to -forma conduit for the-metal from .thepressure pot to the'die; to provide mechanism for the breaking ordisrupting; ofthe sprue prior to the opening of the die, therebyobviating any strain on the casting incident to the breaking oli' of thesprue; to operate the several parts of the working mechanism insubstantial synchronism, and without the necessity of any nicety ofmechanical adjustment between the parts@ to provide especially efficientcooling means for the plate which supports the sp1-ue side of the die;to provide means for guiding the nozzle of the pressure into correctoperative position for feeding metal to the'die, to provide meanswhereby' the main operating mechanisms are actuated pneumatically; andtoso arrange the operating mechanisms that they are positioned rearwardly`of, or .at the opposite side, of the fixed die supporting late fromthe'side thereof which supports t e die, thereby rendering the die moreaccessible and permit- 'trative only, and lof the invention.

vThe general arrangementof the several"L pot- ' tinglof the employmentof dies ofwidely' var ing sizes. I

eatures of the invention other than" those specified will be apparentfromthe hereinafter detailed description talen in conjunction with the`accompanying drawlncs. v

rln theA accompanying drawings l have illustrated differentpracticalembodiments' of the invention, but the constructions thereinshown are to be understood as illus'- Figure 1 is a side elevation ofamachine embodying the present invention.'l

Figure .2 is a plan view of they machine.

Figure 3f is a' central vertical section through the machinelongitudinali Figure 4 is ahorizont-al longitu inal s ection on aline4-4 of' Figure 1.

AFigure 5 is a section on the' line 5--5 Figure 3. 'I f Figure 6 is asection on the line 6 6 Figure 3.

Figure 7 is a section on the line 7--7 Figure 2. i

Figures 8 and 9 are central vertical sections taken longitudinally ofthe machine illustrating the central portion thereof, Figure 8 showingthe parts in casting position and Figure 9 illustrating the same partsin retracted positions.

Figure 10 is a suie-elevation of a fragment of the machine showingcertain mechanism for operating the ,pressure pot.

Figure 11 is a section on the line 11--11 Figure 10. L i

Figures 12 and 13 are face views of baille plates positioned adjacentthe air inlet ofv ally, the sprue is so arranged that its axis forms anangleof 90' degrees with the abutting faces of the die sections, whichare forced together preliminarily to the castingA not as defining thelimits ros ` platewhich, manifestly, also constitutes apvil'pnouncedadvantages over o rmer types.

operation. The gate or s rue forming passageis generally -located fn oneof the two `main .sections of the die, and suitable ejecv tor mechanismis usuallylocated in the other 'e section of said die. r

In carrying out the present invention, these two sections of the die aresupported on separate plates between which relative movement may -be.effected for the purpose l0 of openin and closin the die, and, 1n orderthat the ollowingv escri tion of the Amachine may be clarified, willhereinafter term that section ofthedie with whichf the sprue isassociated, Athe sprue-die section,

and theplate which carries said section, the spruedie sup. orting late.Similarly, the die section w ich em odies the ejector `mechanism wilf'behereinafter termed fthe ejectorfdie section, and the plate which su Inthe accompanying drawings, 1 desig- 'natesthe base'of the` machine,onthe opposite ends of which base'are mounted upright frames 2`and 3.vThe frames 2 and 3 are securely bolted to the base andare held in saced` relation longitudinally of the ma.- c ine byI hollow tubularspacers 4. On the outer face of theframe 3 is mounted a plate fixed tothe frame, as clearly shown inv 5 Bzigure 5, by means of bolts 6, whichextend in ears formedmn the plate 5. Vertical adjuStmentOf the\p`late 5lmay. be had through adjustment of sald'plate mayv be had through theadjusting bolt 8, the slots through which the bo ts 6 pass-serving toallow of such adjustment The plate 5 constitutes the sprue-diesupporting plate; This sprue-diesupporting te -member is water cooled bywater passm through the connections 17 and 18, vin* or er to keep thedie at a working temperature and'also to keep the sprue channel atalproper temperature in the event that the i intermediate water 'acketedmember '59;

hereinafter describe is not employed. While efforts have been made.along these lines, a plate ofthe general ty shown has e sprue-die` iscarried by. plate 5 and is designated in the drawings by the referenceVnumeral 9. 'The sprue-die 9 is secured to the with die 9 and are'rigidly clamped in position by bolts 11, as shown in Figure 3. ITheplate -5 is slotted 4as at 12 to allow of the passage Vof the bolts 11through 'said plate,

andA saidbolts maybe d through any c of saidl slots tojsecure t efdie tothe-plate,

the particular "slot through -which the ,bolts u pafd'epending uponthe/size of the die, so

:that a argevari'ety of `die sizes areiappli- ,cable force-operationwiththe plate/5.

`ports it, the ejector-die supporting plate through elongated slots inthe frame `3 .and fticular type of pressure the threadedadjusting bolts7 while lateral` plate 5 by means of 'clamps 10 which engage Mounted onthe basel and between the frames 2 and 3 isa source of molten metalsupply 14 which is contained with@ a crucible 15 forming part of afurnace 16 supported on the base 1. In this molten metal part of' intothe die by meansof any desired form of the usual t eejector die section,the whole being attached to the ejector die supporting late 25, which ismounted on, and supporte its entire and pass through the hol ow spacerslengltah '4. y mounting the ejector-die supporting b four rods 21, whichextend longitudinali. 'of the machine for substantiall plate -25 in themanner described, the ejectordie 19 issupported for movement toward andaway from the s rue-die 9, for the u rv pose of opening an closinf theVdie. he

late 25 is provided with s ots correspondlng to the slots 12 of theplate 5, and for .the

same purpose.

The invention is not restricted to any par-- lplot or its mounting oroperating means, as t e operatin wou d vary with tiltin pots over t atem'- loyed for lthose of t e non-tilting'type.

owever, for purposes ofillustration a e of tle non-tilting ty e is shownand suita means operating means is 1 lustrated toactuate the same. c YExtending longitudinally .of the between thesframes 2 and v3, andat-eith'er which are' 4slidably mounted two hangers 23 and 24, bestshown in.Figures 6,' 8 and 9.

On the hanger 23 is supported a 'pressure pot 25. The hanger 23 has adepending portion which is pivotally secured tothepressure pot by thepin27, while-'pivotal @movement ofl the pot on this pin "1s lcontrolled bya lthreadedfa'djustiii'g stem 28, pivoted to the .pot at 29, and'extendingup- ;ward1y through a transverse portion 30 of the hangery 23,Nuts 31 are associated with the threaded stem 28, and

lation, 'the `ressure pot may justed on t e pin 27 to bring the nozzle32 inlet c aimel 33` of the sprue-die section.

The pot and pooll 14 are 4so associated with veach .other and with thedie, that .the pot'- `is iat al1 times partially submerged in the moltenmetal pool 14, as shown in i Figure 8,

lio

and 9, but, through tlie mounting of the pot on'the Hanger 23, said pot'is ada ted for4 y sliding-movement on the guides 22 oml the'castingkposition of'Figure 8, wherein 'the is invcasting relation to thedie, to the ,Y positionof Figure 9, Wherein'it is shown asv 1n retractedfi ing position, and vice lversa. Suitable means may be provided fordirectly operating upon the hanger 23 to so move t-he I pot,- but, inthepreferred embodiment of the invention, -this movement is accomplishedthrough intermediate means in the form of the hanger 24, which, asalready described, is alsoY slidably` mounted on the guides V22.

'It will be noted from the drawings, that those portions of the bracketswhich directly engage with! the guides 22 are in interfittingl relation,one of t-he guide engaging bosses of hanger 24 occupyinga position ybetween the guide engaging members of the ment of onel hanger withouteffecting the movement of the other, so that there may be said to be, ineffect, lost motion between saidvhangers which has a particularadvantage hereinafter more fully set forth.

'As stated, the hanger 23 serves as a means' for sliding the pot, andis, in turn, slid back andforth on the guides 22 by a air of racks lfwhich are connected throng adjustable l turnb'uckles 36 to trunnions 34projecting the rack, when reciprocated, serves to 4oscillaterally fromthe hanger 24, as vshown in Figures 10 and 11. The racks 35 are operatedfrom the same source of power as are thejrods 21, and in the preferredembodiment of this invention, the prime mover Consists in pneumaticmeans. r v

S'uperimposed on the frame 2 with their axes extending transversely ofthe machine are apair of cylinders 37, having pistons 38 and 39, oneofwhich is associated with each'cylinder. The .pistons 38 and 39` arerigidly connected to one another by an intermediate rack 40, and are soassociated that when one piston is in fully advanced positionythe otherisin fully retracted position,

and vice versa. .Compressed lair is alter,I

natelyintroduced back of the piston 38 through an inlet 41, and back o fthe piston 39 through an inlet42, said compressed airpreferably.beingcontrolled from a suitable valve; (not shown) toalternately move the pistons in opposite directions. Through thisvoperation ofthe pistons the rack 40 is reciprocated and mover ofthe'machine.

,- frame 2 is a crank shaft 42 rovided with a crank` 43, ,and o n thiscran: shaft isV fixed a gear 44 meshing Withthe rack`40 so that latethe-crank shaft '42: 1Asso'ciate'd-fwith the crank-43 is avconnecting.rod '45 the opl posite Iend ofwhic-h is-pivotally. securedto'` 'a piston 46 which is in turn pivoted to?. the

thisrack forms-the prime'. v

Vl'hanger 24 carries; a transverse bar 55 which,

Mounted inA upstamilmgy relation. in/theres the'4 hanger .lrr'mvesforwardly, engages.' l

bar is 'disengaged from the ponan center of a head 47. (SeevFigllreS 3tina 4i) 'l The opposite ends of the head are provided with aperturesthrough which extend the stems 48 of a pair of racks 49. The stems 4Sare threaded at their ends to receive ad justing bolts, and between theadjusting bolts and the forward portion of the head 47 are .interposedcoil springs 50. ,Thera'cks 49 mesh with gears 51, mounted on a shaft'52, extending transversely ofthe frame and -journalled forvrotation 1nbrackets 53 carried by the frame 2. (See Figures 1, 4, 7,

10 and 11.) Also fixed on the shaft 52 are additional gears 54 withwhich the racks 35, which control .the movement of the pressure pot,co-operate. v

In the commercial adaptation of the invention, thesprings 50 form animportant part since the seating of the nozzle of the pressure pot inthe intermediate member is accomplished by the head 47, through thecompression of` these springs, so that said s pot is virtually held toits seat by the compression of the said springs which in turn are placedunderk compression by said head 47, operated uson by the connecting rod`as des'cribed.- ecause of the fact that the pressure pot is yieldablyheld to its seat, nicety of adjustment in the operating parts of themachine is rendered unnecessary. If Vnog yielding connections wereemployed between the prime mover, the pressure pot, v

and the movable die member, a great nicety. of adjustment would berequiredso that the pressurey pot would come into correct castingposition at the very instant the die was closed, or vice versa, and ifthis adjustment were disturbed through wear, or for other reasons,correct casting (3o-action could not be obtained. Through the employmentof the yielding connections,lhovvv ever, the pressure` pot 1s normallyforced to its lseat slightly before the guide is -fully closed, and theslight subsequent movement required to bring the die into fully closedposition is taken up by the springs which,

merely serve to force the tightly to its seat. g As the crank shaft 42is operated by the rack 40, the connecting rod 45 reci'procatesl thehead 47 which results in' reciprocation of the racks 39 and rotation ofthe shaft 52. The rotation of shaft 52 operates the racks 35 through thegears 54 andshifts hanger 24 longitudinally of the guides 22. The

pressure pot more With'thefn'ozzle endoffthepres'sure pot' 26 throughsaid rod -fw'hich 'is Squared-tc;

te., moved in aretrogradedirection vthe Avthe:

,.after themannershownv :in Figure 8,'an 'Iasi lhan er rides idly ontheguides 22 until the gui eengagmg members of said hanger come inengagement with the' forward guide The object of the double hanger is asfollows. It is desirable that the pressure which locks the pressure potin its ejecting posi- Ation be applied so as not to put bending not beused inasmuch ,as the lockin the strain\ on the piessure pot thereforeif this pressure is applied as shown only a part of ot is strainedduring locking and this straln is one' of compresslon. On the otherhand, in the preferred method of refilling the pressure pot it isnecessary to havethese locking means out of the way when the vacuumibell 72 is lowered.` If a' tilting pressure pot is usedv a doublesupport need could beacomplished b'y pressure Von the ars 27 and theback and front of pressure pot 26 could be connected by a rib or web.Such a pot could be tilted by extending down the link 73 and utilizingthe power of the lever 74 to tilt the pot, although, of course, otherforms of tilting means might well be used. v

Simultaneouslywith the operation ofthe pressure pot as described,the'die members are brought together and separated, in a;c

' cord-ance with the movement of the pressure l pot may be brought intodirect enga with the sprue-die section 9 'to introduce 55 pot, .by thepower applied by the4 prime mover through a cross-head 56, associatedwith the rods 21, carrying the ejector-die section, land the piston 46,to which the con# necting rod 45 1s secured. The' cross-head 56 iscarried by the four rods 21 at the rear end or the machine, andis-clamped upon. said rods by nuts 57 'threaded Vupon the rods, so thatthe Icross-head is adjustable longitudinally thereof. The centralportionof the cross-head 56 is provided with a lcylindrical chamber 58 -inwhich is positioned the piston 46, and the cross-head 56 to permitofslight lost motion. This Vlost motion While hereinafter moreully'described, is for the purpose of allowing of thebreaking of thesprue before the die is opened .t0 obviate fractures of the casting dueto th breaking of the sprue.

It willthus appear that the prime mover, operating through theconnecting rod 45 serves, not only1 to n iove the pressure pot intoandout of castin position, but', simultaneously servesto slide the rods 21longitudinally of the machine for the purpose of opening and closing thedie.

'In car ing out the present' invention eommerca 1y, the ynozzle 32 ofthe pressure gement metal directly from the nozzle-into the die,

.tudinal slidin ong theguides 22 car' 1-ying therewith the pressure pot26.

'9, 14. and 15.

4the die' starts to ope 1,45e,4se

but, in the preferred embodiment of the invention, the machinev ispreferably rovided with an intermediate ortion 59 w ich is supported bythe fixed p ate 5 for longivmovement relative thereto.

The preferre construction of this intermediate member is shown in'Figures 14 and -15.` It i's built up of twofcoaxial tubular elements orsleeves 59 and 59bthreadedtogether and which sleeves arechannelled infteriorly and exteriorly, respectively, to provide an annular-chamberthrough 'which water or some 'other coolingmedium is circulated throughthe inlet and outlet pipes 17%- l' and 18, all as clearly vshown in Fires 8, The water jacket 1s thus formed' which positively preclud theintermediate member from overheating. The intermediate member isprovided with a seat 60 adapted to seat in a depression in ,thesprue-die 9, and is in turn provided with an interior seat 61, adaptedto receive a seat 62 on the nozzle of the pressure pot.

` Moreover, said intermediate member has a bell-shaped mouth 63 withwhich is adapted to. co-ope'rateribs 64, formed on the pressure pot.When the pressure pot is brought into casting position, the ribs 64 areadapted `to engage with 'the bell-mouth 63 -before the nozzle enters thepa'age in the intermediate` member leading into -the die opening, and

serves to. guide the lnozzle 62 to its seat on the seat 61.

As stated, the intermediate member is mounted in the plate .forlongitudinal movement Iand this movement is-nnpaited to said member by alever 65. The lever 65 is mounted on a pivot 66 supported on brackets67, formed on the back plate 5. One arm of the lever 65 extendsdownwardly and is bifurcated to straddlethe interconclusion of thecasting operation, and

while the 'sp'rue is still secured to the die,

the piston 71 is pneumatically operated to impart, through the lever 65,` a backward kick to the intermediate member 59` for thepurpose ofbreaking the sprue, and theparts of the machine are so associated thatthis breaking of the sprue will take place before n. In this connection,it will be noted that inlet'passage 33 in the sprue-,die section istapered outwardly, and

4the outlet of the intermediate member 591is similarly formed, so thatthe sprue is formed l I with a weakened zone at which it is broken whenthe intermediate member isgiven the dden kick b the lever 65 -asdescribed.

' A'urther vantage of making the sprue- .die inlet tapered is that whenthe metal -therein `partially solidies,- preliminary to the breaking ofthe s rue, the force of the klok-referred to will e transmitted to the.tapering wall of lthe inlet 33 which will take the force of vthe blowand will not transmit such force to the casting Within the die.

The pressure pot 26 has beendescribed/ as movable into and out ofcasting position,

the reason for moving it out of casting position being to allow ofthe-refilling or recharging thereof. Inpractice, the pot 26 may befilled in various ways, andits construction may be varied from thatdisclosed lin the drawings, so that it may be tilted is specificallyshown and described, but in the present ease, the mechanism foroperating the filling mechanism is shown as eoordinating wlth the`remaining operating parts of the machine.

Supported -for vertical movement in the machine is a vacuumbellp72'which is supported by a link`73 from fa lever 74. The lever 74is fulcrumedl at 75, and -with its short arm is associated a.' rollerf76adapted -to eng-age with a depending flange of a cam Y plate 77, lfixedon the crank shaft 42. The

, parts of the machine are lso associated Aand timed that when the camshaft moves to a.

position to retract the pressure pot into the lling position of Figure9, the low face of the cam 77 comes into operative relation with thelever 74 and causes the vacuum `bell 72 t0. be lowered from the positionshown- .in Figure 8 to thatof Figure 9. Timed with this operation airisexhausted from the bell 72 through the connection 78, and

the pressurev'pot is charged as describedl 1n myco-pendingy application.After the ot Vlias'been charged, the bell is again llfted y the'cam 77to the position of Figure 8,

andthe pressure pot moved forward into casting position. Thereafter,compressed air is introduced into, the pressure pot through thecompressed air inlet 80, and

' 2, 3, 4, 8, 14 and 15. .Fluid under pressurey cois-'adrnittedby -asuitable valve, to one ofy serves 't0 force the metal within thepressure pot into the die in the usual manner.

,The consecutive steps in the operation of the machine .will now be4described, it being I' assumed that the parts jof the machine are in thecasting position as shown in Figures l1,

4the cylinders 37 behind the piston 38. The prime moving rack 40actuates the gear 44, which, through the crank 43, exerts a pull on. thecon "ating rod 45. rlhe piston 46 movesforwardly 4`for its lost motionin the cylindrical chamber A58, and carries therewith the head 47,which, through thefracks 49, gears 52 and. 54, and the racks 35 areconnected with the hanger 24. Simultaneously with the start of' thisoperation for retracting the pressure pot, compressed air is admittedbehind the piston 71 which operates through link y and lever 65 to givea backward kick tothe intermediate member 59 and break ,the sprue.` Bythe time the sprue is broken the lost motion of the cylvinder 46 incross-head 56- iS taken up, andr said piston 46 causes movement of thecrosshead `56, which being secured to the rods 21, causes forwardsliding movement thereof.A Asthe rods 21 move forwardly, they carry withthem the ejector die supporting plate 24, on which the ejectordiesection is supported, and thus serve` to separate the' die sections.The pressure pot is thus withdrawn to its retracted position and the dieopened.

As the die approaches its full opening, the pressure pot comes into thefully retracted position of Figure 9, at which time the mutilated gears54, which co-operate with the racks 35, come to the smooth secy tion ofthe gears, andfurther movement of the pot ceases while the diecontinuesv to open. As soon'as the pressure pot stops, the cam 77 istimed to drop the vacuum bell 72 over the mouth of the pressure pot, 'asshown in YFigure 9, and the charging ofthe vpot commences. Thediecontinues to open for a short distance and reaches itsy maxim0 behindthe piston "39 and the die. starts to 105 close, and after it hastraveled a short dist-ance, the mutilated gears 54 once more engage with.the racks 35 and start to move the lplressure pot again into castingposition.

owever, just before the pot begins to move, the cam 77- operates thelever 74 to raise the bell 72-out of the path of the pot. The

ot continues to move to'casting position, its nozzle being finallyguided into the intermediate member 59 by the ribs 64 (Fig- 115 ures 14and 15), and the ejector-die section 19 is simultaneously lmoved to faceabutting relation with the sprue-die section. As soon as the partsbecome tightly associated for casting, pressure is admitted to the pot,and the molten metal therein is forced into the die, and the cycle ofoperations as described are recommenced for the next casting.

Having thus fullydescribed the invention, what l claim as new, anddesire to secure by Letters Patent is:`

1. ln a die casting 1nachine, a sprue-die supporting plate, anejector-die supporting plate, and operating means for' eectmg relativemovement between said plates, said said operating means. g

"2. In adie casting machine, alixed spruedie supporting pla e, a movableejector-die supporting plate, operating means for moving saide]ector'die supporting plate to and from the sprue-die supporting plate,said sprue-die supporting p ate being positioned intermediate theejector-die supporting plate and said o erating means.

3. In a ievcastmg machine, a sprue-die supportin plate, an ejector-diesupporting plate, an fluid ressure `operating means Jfor eectingrelative movement between said plates, said sprue-die supporting platebeing positioned between the ejector-die supporting plate and saidilu-id pressure operating means. 'I

4. In a die casting machine, a sprue-de supporting plate, an ejector-diesupporting plate, operating means for effecting relative movementbetween said plates, said s ruedie supporting plate being .positionebetween the ejector-die supporting plate and said operating means, andmeans for cooling the sprue-die supporting plate.

5. In a die casting machine, a fixed sprue- 'die supporting plate anejector-die supporting'platemovable relative to the fixed plate, and4positioned at oneside of said fixed plate, and o erating mechanismatt'he'other side of the xed plate for moving the movablelate to andfrom the fixed plate. 6. In a die casting machine, a fixed` diesupporting plate, a. relatively movable die able late is supportingplate, guides for mountingthe movable die suppOrting plate for movementA to and from the fixed die supporting .pla-te, and means co-operatingwith said guides for ,imparting movement to the movable plate, whichmeans are located on one side of the fixed die support' plate, while thevmovocate on the opposite side of the xed plate.

'7. In a die4 casting machine, relatively movable die supporting plates,a pressure pot movable to and from one of the die suporting platea-andcommon meansV for efeeting relative movementfi'n alternately oppositedirections between the' die suprting plates and between at least one o'the die supporting plates and the pressuret, while the lplates and potare maintane -in substantie y horizontal alinement;

V8. In a die casting machine, afixed spruedie supporting plate movablerelative thereto', a pressure pot movable to and from the fixedsprue-die supportin plate, and

unitary means for eecting t e movement of the movable die .supportinglplate and the pressure in alternately opposite directions, whlle `thelate -and potere maintained in substantiallyhorizontalalinement.

site movable die su portin ejector-die supporting plate, a ressure'pot,a prime mover, connections tween the prime mover and the `movableejector-die supporting plate for positively moving said plate in ahorizontal direction, and connections between the primev mover andthepressure pot for yieldably forcing the pressure pot ma horizontaldirection into easting position, the supporting plate an'd pressure "otbeing alternately moved in oppoirections and in' substantiallyhorizontal alinement.

10. In a die casting machine,.relatively Imovable die supporting plates,complementarysec'tions carried. b said plates, a pressurev pot bodilymovab e relative to both of said plates vin. a horizontal direction, and

means for rigidlybringing-the`die sections into casting` re tion, andfor yieldably forcing the pressure potintocastmg positionrelative to thedie. 1 1. In a `die casting machine relatively movable'di'e sup' rtingplates through one of which a meta conduit passes, a ressure pot movablerelative to one of sai plates, means for charging the pressure pot, and

common means for effecting relative move.-

ment between the die supporting plates and for operating the means forcharging the pressure pot and to alternately move said pot into and loutof cooperative relation with'the'metal conduit. 12. Ina die castingmachine, relatively movable die supporting platesthrough one of which atmetal conduit passes, a ressure pot movable relative to one of sai meansvfor charging the Vpressure pot," and automatic means for 'efectlngrelative movement between the die supportin plates and for operatingthe-means for c erging the pressure pot and to alternately move said potinto and out of cooperative relation with the metal conduit.

13. In a die casting machine, relatively means for chargingthe pressurepot, `and fluid pressure means for effecting relative.

movement` between the die supporting plates and for operating the meansfor charging the pressure pot and to move said pot into a position .to apassa in one vof the supporting plates` l'I rvde for this purpose. f

14. In a die casting machine, relatively plates, a ressure pot suspendedor bodi y reciprocation in -a horizontaldirection relative to both ofsaid plates, means for char means .for effecting t eI .relative movementbetween the die` supporting plates, and

.means for moving the preure pot to bring the latter into-position tofeed metal to the dle'through a` metal conduit, provided for 0 8 9.' Ina die casting machine, a movable this purpose,` on-one of the plates, incombiv plates,l

novv

eed metal intov the die through ng the `pressure pot,

Limpias 'l nation with unitary means for controlling `the operation ofthe movinggand charging means.

'15. 'In a die casting machine, a ressure .5 pot having a nozzle portionprovi ed with a valve vseat and apart of which nozzle Lp'or-v tionprojects beyond the valve seat, a spruedie sectlon providedY with avalve" seat, a member intermediate` said nozzle and the sprue-diesection, said intermediate, member -being adapted to beseated inthe'valve seat y of thevsprue-die section and being provided with a seatto receive said nozzle seat.`

. 16. In a die csting machine, a pressure pot provided'with a nozzle,having a seat yand apart projecting in front of said seat, a sprue diesection provided with a seat, an intermediate section adapted to eng iththe seat of the spre diesectionnnd form a 20 seat for the nozzle, andmeans for cooling said intermediate section.

17. In a d ie casting machine, adie, a pressure pot provided with anozzle, an intermediate portionthrough which the-metal -V isfed from thenozzle-to' the die when the imparting a sharp imparting a Sharp whichmetal Hows from t passages meet, for the which is less than that oftheoutlet, a pres-' arts are in casting osition, and means for ock -to saidintermediate portion'to move it awayromthe die for the pu ose ofbreakingt e sprue.

18. In a ie casting machine, a die, apressure pot provided withafnozzle, an 'inter-A mediate portion through which the metal is vfed'from the nozzle te the ydie when the partsare in casting pesltion, andmeans for ock to said intermediate portion to move' it away from the diefor the purpose of breaking the sprue, andy simultaneouslyretracting'the nozzle vfrom litsc'asting position.

19. In a die casting machine, al die pr0- vided -with a sprue passage,a' pressurepot `provided with a nozzle, and.y an intermeiate memberpositioned between the nozzle and the die and havinga passage throughinto'the die, 'the pas s. of the interme-` diate member and the 'e beingtapered in opposite directions to provide a line ofA sure pot providedwith a nozzle, a feed member intermediate the nozzle and the said sprueppening, said feed member 'having'an outlet of substantially the samearea 00 as the inletto the spruel opening, whereby eY ,pressure pot thevsprue having a weakened sectionis formed on the casting.

2 1. In av die castingamachine, a die prof vided with an inlet, apressure pot provlded with, a nozzle, an intermediate member havin apassage forfeeding metal to the inlet the die, .and means mounted on thepressure pot and co-operating with the intermediate portion for guidingthe nozzle into the passage of the intermediate portion, said meansoperating so as to engage with the intermediate member before the nozzle.enters the passage of the latter.`

22. In a die casting machine, a die supportin' plate, a d ie mountedonone side of said p` ate, -a source of metal supply on the opposite s1deof lsaid late, a member intermediate the source ofp metal sup ly and thedie, and common means for cooling the ldie suptporting plate and thesaid intermediate me ber.

23. In a die castingmachine, a die em- `bodying separable sections, oneof which is fixedl mounted and the -other of which is mova le toward andaway from. thefixed die` section, a receptacle adapted to contain a poolof molten metal, a pressure ot adapted to be suspended from the meta insaid 'receptacle and mounted for sliding movement toward and away fromthe ixed die section, and means `for forcing the die sectionstogetherand for yieldably forcing the pressure t into cooperative relation withthe fixedplie section.

24. Inl a die castingmachine, a sprue die supporting plate, an` ejectordie supporting plate operatlng means for effecting relative movementbetween said plates, and avmovable pressure pot, the Asaid porting plateeing positione between t e `eJecto'r-die supporting plate and saidoperatin means.

-25 n a 'die casting machine, a die, Ic ombmatlon with means forbreaking the sprue through a. direct-pull in 'a direction -longitudinaly of the sprue, without opening the die and without moving said die fromthe casting position.

v26. A die su porting late for casting machines embo ying a sustantially central channel into :which a coolinmfluid is introduced,laterally-extending channels leadin 'from thc central channel towardthelatera edges of the plate, and means for allowing of the egress of thecooling Huid after lit has /traversedsaid channels.

In testimony whereof, I have signedmy name to this specification.

if CHARLES M. einer.`

